Lathe Controls Lathe Speeds - Grizzly G4015Z Owner's Manual

SECTION 6: LATHE CONTROLS
Lathe Speeds
Before using the lathe, the hub on the end of the
lathe spindle must be pulled out as shown in
Figure 15. To ease engagement of this hub,
slowly rotate the lathe spindle by hand while gen-
tly pulling the hub.
LATHE
SPIN DLE
PULL EY
HUB
PULL ED
D
E
OUT
F
MIDDLE
A-F
PULL EY
C
B
RPM 160
A
MOTOR
PULL EY
Figure 15. Speed chart.
The speed of the lathe is controlled by the posi-
tions of the belts on the pulleys. The chart in
Figure 15 shows the various combinations of belt
positions for achieving a range of 6 speeds.
Example:
To select a spindle speed of 310 R.P.M., place a
belt on the 3rd sheave (from the outer-most
sheave) of the middle pulley and the 2nd sheave
of the spindle pulley. Place a belt from the first
sheave on the motor pulley to the first sheave of
the middle pulley.
To change belt position:
1. Unplug the machine.
2. Loosen the tensioning nut located just above
the motor. See Figure 16.
Loosen the nut on shaft for the middle pulley.
3.
See Figure 17.
Lift the motor and remove the lower belt from
4.
G4015Z Lathe/Mill
LATHE SP EE DS
A-E A-D B-F C-F B-E
310 375 480 610 880 1380
the motor pulley.
Place the upper belt in the desired position.
5.
6. Place the bottom belt in the desired pulleys.
7. Pull tension on the upper belt with the middle
pulley and tighten the nut loosened in step 3.
Tighten the tensioning nut just above the
8.
motor until there is
ate pressure. Do not over tighten.
C-D
Figure 16. Tension nut shown.
Figure 17. Loosen this nut to adjust pulley.
1 ⁄ " deflection with moder-
4
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